Audiovisual content generation method for multistage high-speed reproduction

Abstract

The present invention is to solve a problem that, at the time of high-speed reproduction using compressed video data, an audio distribution bandwidth increases simply in proportion to a high-speed reproduction rate. An encoding device includes: an audio encoding part configured to encode an audio signal; a video encoding part configured to encode a video signal; and a multiplexing part configured to multiplex audio data outputted by the audio encoding part and video data outputted by the video encoding part. The multiplexing part is configured to, at the time of high-speed reproduction, multiplex by locating audio data within a predetermined range into a picture configuring video data, the picture being distributed at a speed equal to or less than a predetermined reproduction speed but being not distributed at a speed more than the predetermined reproduction speed.

The invention claimed is: 
     
       1. An encoding device implemented on a hardware processor, comprising:
 an audio encoding device, implemented on the hardware processor, configured to encode an audio signal; 
 a video encoding device, implemented on the hardware processor, configured to encode a video signal; and 
 a multiplexing device, implemented on the hardware processor, configured to multiplex audio data outputted by the audio encoding device and video data outputted by the video encoding device, 
 the encoding device configured to perform high-speed reproduction in which a process of thinning video data on a picture basis and outputting the video data is executed corresponding to a reproduction speed, 
 wherein the multiplexing device is configured to, at the time of high-speed reproduction, multiplex by locating the audio data into a picture configuring the video data, the picture being distributed at a speed equal to or less than a predetermined reproduction speed but being not distributed and being thinned at a speed more than the predetermined reproduction speed. 
 
     
     
       2. The encoding device according to  claim 1 , wherein:
 the high-speed reproduction is performed by a thinning process of eliminating a predetermined picture from the video data depending on a reproduction speed; and 
 the multiplexing part is configured to multiplex by locating the audio data into the picture eliminated from the video data in a case that the reproduction speed is more than the predetermined reproduction speed. 
 
     
     
       3. The encoding device according to  claim 1 , further comprising:
 a capture part configured to receive the audio signal and the video signal; and 
 a transmitting part configured to transmit an audiovisual signal outputted by the multiplexing part. 
 
     
     
       4. A streaming distribution system, comprising:
 encoding device according to  claim 1 ; 
 a distribution device configured to distribute an audiovisual signal from the encoding device; and 
 a reproduction device configured to reproduce the audiovisual signal distributed by the distribution device. 
 
     
     
       5. An audiovisual content generation method in an encoding device comprising:
 encoding an audio signal; 
 encoding a video signal; and 
 multiplexing audio data and video data ouputted as a result of the encoding, 
 performing high-speed reproduction in which a process of thinning video data on a picture basis and outputting the video data is executed corresponding to a reproduction speed, 
 wherein the multiplexing is, at the time of high-speed reproduction, multiplexing by locating the audio data into a picture configuring the video data, the picture being distributed at a speed equal to or less than a predetermined reproduction speed but not being distributed and being thinned at a speed more than the predetermined reproduction speed. 
 
     
     
       6. The audiovisual content generation method according to  claim 5 , wherein:
 the high-speed reproduction is performed by a thinning process of eliminating a predetermined picture from the video data depending on a reproduction speed; and 
 the multiplexing is multiplexing by locating the audio data into the picture eliminated from the video data in a case that the reproduction speed is more than the predetermined reproduction speed.